<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar
      class="page-nav-bar"
      left-arrow
      title="黑马头条"
      @click-left="$router.back()"
    ></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      {{ articleId }}
      <!-- 加载中 -->
      <div v-if="loading" class="loading-wrap">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div v-else-if="article.title" class="article-detail">
        <!-- 文章标题 -->
        <h1 class="article-title">{{ article.title }}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            :src="article.aut_photo"
          />
          <div slot="title" class="user-name">{{ article.aut_name }}</div>
          <div slot="label" class="publish-date">
            {{ article.pubdate | format }}
          </div>
          <!-- //关注按钮‘ -->
          <van-button @click="loadingBtn" type="info" :text="text" />
          <!-- <van-button type="info" loading-text="已关注" /> -->
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div
          class="article-content markdown-body"
          v-html="article.content"
          ref="article-content"
        ></div>
        <van-divider>正文结束</van-divider>
        <!-- 文章评论列表 -->

        <!-- /文章评论列表 -->
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div v-else-if="errStatus === 404" class="error-wrap">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div v-else class="error-wrap">
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn" @click="loadArticle">点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>
    <!-- //图片预览 -->
    <van-image-preview v-model="show" :images="images">
      <template v-slot:index>第{{ index }}页</template>
    </van-image-preview>

    <!-- /底部区域 -->

    <div style="position:fixed;bottom:0;width:100%">
      <van-cell style="justify-content:space-between">
        <van-button
          slot="title"
          round
          block
          type="info"
          size="mini"
          native-type="submit"
        >
          写评论
        </van-button>

        <div
          style="flex:1;display:flex;justify-content:space-around;align-items:center;"
          slot="extra"
        >
          <van-icon name="comment-o" badge="9" />
          <!-- <van-icon name="star-o" /> -->
          <collect-article :article="article"></collect-article>
          <!-- <van-icon name="good-job-o" /> -->
          <like-article :article="article"></like-article>
          <van-icon name="share" />
        </div>
      </van-cell>
    </div>
  </div>
</template>

<script>
import { ImagePreview } from "vant";
import { getArticleByIdApi, followingsApi } from "@/api";
import { setTimeout } from "timers";
import collectArticle from "@/components/collect-article";
import likeArticle from "@/components/like-article";
// import { create } from "domain";
export default {
  props: {
    articleId: {
      type: [String, Number, Object],
      required: true
    }
  },
  name: "",
  data() {
    return {
      loading: true, //加载中
      article: {},
      errStatus: null,
      loadingFlag: false, //  设限制loading是否开启
      text: "关注",
      flag: false, //定义是否关注
      //图片预览
      show: false,
      index: 0,
      images: []
    };
  },
  methods: {
    //getArticleInfo点击文章获取文章详细信息
    async getArticleInfo() {
      try {
        const res = await getArticleByIdApi(this.articleId);
        // console.log(this.loading, 4545454);

        this.article = res.data.data;
        //获取图片资源
        setTimeout(() => {
          this.getimages();
        }, 0);
        console.log(this.article, 33333333);
        this.loading = false;
      } catch (err) {}
    },
    //  点击关注按钮  切换 事件
    loadingBtn() {
      console.log(this.article.art_id, 66666666666);

      this.loadingFlag = true;
      this.followings();
      this.text = "已关注";
      this.loadingFlag = false;
    },
    //关注用户事件
    async followings() {
      const res = await followingsApi(this.article.art_id);
      console.log(res, 45454545);
    },

    //图片 获取  绑定点击事件
    getimages() {
      //获取当前组件的数据this.$refs
      var connent = this.$refs["article-content"];
      //   获取当前组件的所有图片数据
      var images = connent.querySelectorAll("img");
      //循环所有的图片  拿到每一项的src值 并push到images数组中
      images.forEach((element, index) => {
        // console.log(element, 33333333);
        this.images.push(element.src);
        //给每一张图片添加点击事件
        element.onclick = () => {
          this.show = true; //true让图片预览显示
          //指定初始位置
          ImagePreview({
            images: this.images,
            startPosition: index
          });
        };
      });
    }
  },

  created() {
    this.getArticleInfo();
  },
  components: {
    collectArticle,
    likeArticle
  }
};
</script>
<style scoped lang="less">
// @import url("~assets/github-markdown");
@import url("../../../assets/github-markdown.css");

.article-container {
  .van-button--info {
    color: #333;
    background-color: #fff;
    border: 0.02667rem solid #888;
  }
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 100px;
    bottom: 0;
    background-color: #fff;
  }
  .article-detail {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    /deep/ .van-icon {
      font-size: 40px;
    }
    .comment-icon {
      top: 2px;
      color: #777;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
    .btn-item {
      border: none;
      padding: 0;
      height: 40px;
      line-height: 40px;
      color: #777777;
    }
    .collect-btn--collected {
      color: #ffa500;
    }
    .like-btn--liked {
      color: #e5645f;
    }
  }
}
</style>
